Correct. Unlike WAW Tal in Istanbul says they don't do tickets.
This happened (sort of) at WAW a couple of months ago. BA started quoting a fare in PLN (Zlotych) that translated to a lot more than US$5000 for a DONE4. Tal sold a few at $5K ticketed by AA (which has a BA codeshare to WAW - none to IST because they have TK as a partner) then the whole starfile changed to the PLN basis and nuked the benefit of Poland as a start point.
Sic transit gloria bargains I suppose. Enjoy Croatia or Bulgaria while you can.